FIA-appointed Formula 1 stewards handed Ferrari boss Fred Vasseur and his Mercedes counterpart Toto Wolff formal warnings regarding their conduct during a Las Vegas Grand Prix press conference last week.
On Thursday, ahead of the season-ending Abu Dhabi Grand Prix, F1 Stewards said in a statement that the FIA's media delegate had reported the pair for "the use of certain language" during the 16 November press conference in Las Vegas.
The hearing found both bosses broke an article of the FIA's International Sporting Code covering "moral injury" to the governing body or motorsport in general through words, deeds or writings.
Vasseur used profanity in an angry response to a question after Carlos Sainz's Ferrari was wrecked by a loose drain cover during the aborted first practice session.
Wolff also swore at a suggestion the cancelled practice was a "black eye" for F1.
The stewards said Vasseur's language was unacceptable and would not be tolerated in future but noted that the Frenchman was "extremely upset and frustrated by the incident" and was not speaking normally.
They accepted also that Wolff's language was not typical and provoked "by an abrupt interjection" during the press conference.
Mercedes and Ferrari are fighting for second place in the 2023 F1 World Championship championship dominated by Red Bull, with just four points separating the two teams.